Lesson 12: WHEELS & TIRES

Question 1

What are aircraft wheels made of?

Answer 1

Forged Al

Magnesium alloy

Question 2

Due to high surface tensile loads, what is the most critical part of the wheel?

Answer 2

BEAD SEAT AREA

Question 3

What are 2 types of wheel design?

Answer 3

Split Hub

Flange type

Question 4

This component will deflate the tire in the even of extreme OVERHEAT

Answer 4

Fusible plug

Question 5

This type of wheel is essentially a single piece hub with a removable flange acting like an outboard

Answer 5

FLANGE type

Question 6

During wheel maintenance what is the key factor?

Answer 6

Deflate the tire PRIOR to loosening axle nut

Question 7

Why should you never remove two wheels from the same axle at the same time?

Answer 7

In case the jack collapses

Question 8

Tube and tubeless are types of what?

Answer 8

Tires

Question 9

What are the primary parts of a tire?

Answer 9

BEAD
CARCASS
TREAD
SIDEWALL

Question 10

What is the most important part of the tire and why?

Answer 10

BEAD,

• anchors the carcass and provides firm mounting surface for tire on wheel
• all forces terminate at the bead

Question 11

Bias and radial are types of what?

Answer 11

CARCASS

Question 12

This component of the tire gives it the required traction and is the outer surface

Answer 12

TREAD

Question 13

What are 4 types of tread?

Answer 13

plain
all weather
rib
chine

Question 14

This part of the tire is a rubber cover extending from the tread down to protect from cuts, bruises, moisture and ozone

Answer 14

SIDEWALL

Question 15

What is the purpose of the sidewall?

Answer 15

Protect the carcass plies

Question 16

When inspecting tires, what are we looking for?

Answer 16

Inflation

Tread/sidewall condition

Question 17

When should tire pressure be checked?

Answer 17

tire is cold, 2-3hrs after flight arrival

Question 18

How should tires be inflated?

Answer 18

SLOWLY

LOW pressure nitrogen

Question 19

If the pressure differential should rise above a predetermined value on 2 tires at the same axle, what do you do?

Answer 19

Both replaced

Question 20

If a tire is over inflated, how would you know?

Answer 20

Centre tread wear

Question 21

If it under inflated, how would you know?

Answer 21

`Shoulder tread wear

Question 22

If the tread has a worn flush, or a carcass ply is exposed what does this tell you?

Answer 22

Unservieable

Question 23

When do you place a tire in an inflation cage?

Answer 23

initially installed on wheel

Question 24

What is the general rule for replacing a tire with a cut?

Answer 24

exceeds 1/2 rib width

carcass ply exposed

Question 25

Rough runways could cause ?

Answer 25

CHUNKING

Question 26

How would tread separation occur?

Answer 26

excessive loads

heating from underinflation

Question 27

Cross grooved runways can cause what?

Answer 27

CHEVRON CUTTING

Question 28

This component deflects water away from tail mounted engines

Answer 28

CHINE

Question 29

2 types of tube construction?

Answer 29

Reinforced rubber

reinforced nylon fiber

Question 30

What are the 2 primary causes of aircraft tube leak?

Answer 30

tube hole

defective valve

Question 31

The yellow mark on a tube represents what?

Answer 31

Heavy point